ADS4129IRGZ25 - 12-Bit 250MSPS Ultra-Low-Power ADC | Texas Instruments
Référence : ADS4129IRGZ25 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $32.5 | $32,50 |
| 10 | $29.25 | $292,50 |
| 100 | $26.1 | $2 610,00 |
| 500 | $22.8 | $11 400,00 |
| 1 000 | $19.45 | $19 450,00 |
ADS4129IRGZ25 Présentation
An analog-to-digital converter (ADC) is a semiconductor device that converts continuous-time analog signals into discrete digital codes for downstream processing by FPGAs, DSPs, microcontrollers, or ASICs. The pipelined ADC architecture the ADS4129IRGZ25 uses breaks the conversion into multiple low-resolution stages, each driving a residue that is amplified and quantized by the next stage. Pipelined ADCs sit in the hierarchy: pipelined ADC -> successive-approximation (SAR) and flash alternatives -> data converter -> signal chain IC -> semiconductor. They are the dominant architecture for sample rates from 50 MSPS to 500 MSPS, where SAR converters are too slow and flash converters consume excessive power.
Key features of the ADS4129IRGZ25 include 12-bit resolution, 250 MSPS maximum sampling rate, LVDS-based DDR (double data rate) or CMOS digital output interfaces, integrated internal reference (with the option to drive an external reference), programmable analog input full-scale range, and a serial control interface (SPI) for register configuration. The device supports both single-ended and differential analog inputs, with input bandwidth typically exceeding 700 MHz. Power consumption scales with sample rate, allowing designers to trade speed for power in the same hardware.
Typical applications include high-speed instrumentation, communications test equipment, cable-headend downstream receivers, software-defined radio (SDR), radar signal processing front ends, medical imaging front ends (ultrasound beamforming), and industrial high-speed data acquisition. The combination of 250 MSPS, 12 bits, low power, and small 7x7 mm package makes it well suited to size-constrained, thermally limited designs.
When designing with the ADS4129IRGZ25, ensure the analog input network uses a properly terminated, bandwidth-matched differential transformer or differential amplifier - poor input matching will directly degrade SNR. Decouple AVDD and DRVDD with a 1 uF plus 0.1 uF capacitor pair placed within 2 mm of each supply pin, and provide an isolated ground plane for the digital return currents to avoid coupling switching noise back into the analog front end.
This page synthesizes distributor pricing, drop-in alternatives from the same TI family and pin-compatible cross-brand parts, application companion chips, and practical design notes that go beyond what the manufacturer datasheet alone provides.
Alternatives de remplacement direct pour ADS4129IRGZ25 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ADS4129IRGZ25 (même facteur de forme et même empreinte) — différant par Operating Temperature Range, Analog Supply Voltage, Input Type, Package, Resolution.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADS4128IRGZR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS4149IRGZ25
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS4142IRGZ25
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS6129IRGZ25
✅ Remplacement direct✓ En stock
$23.1 / unité
Voir la fiche technique →ADS6149IRGZ25
✅ Remplacement direct✓ En stock
$20.85 / unité
Voir la fiche technique →ADS4148IRGZR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS4129IRGZ25 Valeurs maximales et caractéristiques électriques
| Résolution | 12 bit |
| Number of Channels | 1 |
| Architecture | Pipelined |
| Sample Rate (max) | 250 MSPS |
| Analog Supply Voltage | 1.8 V |
| Digital Supply Voltage | 1.8 V to 3.3 V |
| Input Type | Differential / Single-ended |
| Digital Output Interface | LVDS DDR / Parallel CMOS |
| Reference Type | Internal (external optional) |
| Plage de température de fonctionnement | -40 C to +85 C (Industrial) |
| Boîtier | 48-VQFN (RGZ) 7x7 mm |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de ADS4129IRGZ25
| Broche 1 | AVDD — Analog supply, 1.8 V |
| Broche 2 | AVDD — Analog supply, 1.8 V |
| Broche 3 | INP — Differential analog input positive |
| Broche 4 | INM — Differential analog input negative |
| Broche 5 | AVDD — Analog supply, 1.8 V |
| Broche 6 | VCM — Common-mode voltage output for input biasing |
| Broche 7 | REXT — External resistor for internal reference current setting |
| Broche 8 | REFP — Internal reference voltage positive decoupling |
| Broche 9 | REFM — Internal reference voltage negative decoupling |
| Broche 10 | AVDD — Analog supply, 1.8 V |
| Broche 11 | AVSS — Analog ground |
| Broche 12 | AVSS — Analog ground |
| Broche 13 | CLKP — Differential sampling clock input positive |
| Broche 14 | CLKM — Differential sampling clock input negative |
| Broche 15 | AVDD — Analog supply, 1.8 V |
| Broche 16 | AVSS — Analog ground |
| Broche 17 | SCLK — SPI serial clock for register access |
| Broche 18 | SDATA — SPI serial data input |
| Broche 19 | SEN — SPI enable, active low |
| Broche 20 | RESET — Hardware reset, active low |
| Broche 21 | PDN — Power-down mode, active high |
| Broche 22 | AVDD — Analog supply, 1.8 V |
| Broche 23 | DRVDD — Digital output supply, 1.8 V to 3.3 V |
| Broche 24 | DRVDD — Digital output supply, 1.8 V to 3.3 V |
| Broche 25 | DRVSS — Digital ground |
| Broche 26 | D0_P — LVDS data output bit 0 positive |
| Broche 27 | D0_M — LVDS data output bit 0 negative |
| Broche 28 | D1_P — LVDS data output bit 1 positive |
| Broche 29 | D1_M — LVDS data output bit 1 negative |
| Broche 30 | D2_P — LVDS data output bit 2 positive |
| Broche 31 | D2_M — LVDS data output bit 2 negative |
| Broche 32 | D3_P — LVDS data output bit 3 positive |
| Broche 33 | D3_M — LVDS data output bit 3 negative |
| Broche 34 | D4_P — LVDS data output bit 4 positive |
| Broche 35 | D4_M — LVDS data output bit 4 negative |
| Broche 36 | D5_P — LVDS data output bit 5 positive |
| Broche 37 | D5_M — LVDS data output bit 5 negative |
| Broche 38 | D6_P — LVDS data output bit 6 positive |
| Broche 39 | D6_M — LVDS data output bit 6 negative |
| Broche 40 | D7_P — LVDS data output bit 7 positive |
| Broche 41 | D7_M — LVDS data output bit 7 negative |
| Broche 42 | D8_P — LVDS data output bit 8 positive |
| Broche 43 | D8_M — LVDS data output bit 8 negative |
| Broche 44 | D9_P — LVDS data output bit 9 positive |
| Broche 45 | D9_M — LVDS data output bit 9 negative |
| Broche 46 | D10_P — LVDS data output bit 10 positive |
| Broche 47 | D10_M — LVDS data output bit 10 negative |
| Broche 48 | DCLK_P — LVDS data clock output positive |
| Broche EP | EP — Exposed thermal pad - connect to analog ground plane |
Applications typiques
ADS4129IRGZ25 convient pour 6 applications: Wideband Communications Test Equipment, Software Defined Radio (SDR) Receiver, Medical Ultrasound Beamforming Front End, Cable Headend Downstream Receiver, Radar Signal Processing Front End, Industrial High-Speed Data Acquisition.
Wideband Communications Test Equipment
The ADS4129IRGZ25's 12-bit, 250 MSPS performance makes it well suited for wideband communications test equipment that digitizes IF signals from cable, wireless, and backhaul systems. With LVDS DDR outputs, it can stream 12-bit samples at 250 MSPS into an FPGA for real-time FFT analysis, modulation analysis, and bit-error-rate testing without data loss. The 1.8 V analog supply reduces thermal load in dense multi-channel test rigs, while the VQFN-48 footprint allows tight placement of multiple ADCs on a single board. Designers can pair it with a low-noise LDO such as TPS7A4701 for the analog rail and an LMK04803 clock jitter cleaner for the sampling clock. Compared with general-purpose oscilloscope ADCs, the ADS4129IRGZ25's pipelined architecture provides the throughput needed for production-line tester throughput.
Recommandé
Software Defined Radio (SDR) Receiver
In software-defined radio receivers, the ADS4129IRGZ25 digitizes IF signals up to 250 MSPS, allowing downstream FPGAs to perform channelization, demodulation, and channel filtering in software rather than analog hardware. Its wide analog input bandwidth supports direct IF sampling of signals in the 70-200 MHz range, eliminating an analog downconversion stage and reducing BOM. The LVDS DDR interface streamlines capture into FPGAs such as Xilinx Kintex or Artix, while the small 7x7 mm VQFN package simplifies dense multi-channel SDR designs like MIMO or phased-array front ends. Pair the ADS4129IRGZ25 with a wideband transformer like the Mini-Circuits ADT1-1WT and an LNA such as MGA-62563 for a complete receive chain.
Recommandé
Medical Ultrasound Beamforming Front End
The ADS4129IRGZ25 is frequently used in portable and mid-tier ultrasound systems where each channel of a phased-array transducer must be digitized at high speed. At 250 MSPS with 12-bit resolution, it captures RF echoes across the full ultrasound band (typically 1-15 MHz), while the small VQFN-48 package supports dense 32, 64, or 128-channel arrays required for real-time imaging. Its low power consumption keeps total system heat within portable-cart thermal budgets, and the LVDS outputs cleanly fan into downstream FPGAs that perform beamforming and envelope detection. Designers commonly pair it with an LMH6624 low-noise front-end amplifier and an LMK04031 clock distribution IC. Compared with older 10-bit ultrasound ADCs, the ADS4129IRGZ25's extra 2 bits directly improve dynamic range and penetration depth in B-mode imaging.
Recommandé
Cable Headend Downstream Receiver
In DOCSIS 3.1 cable headend equipment, the ADS4129IRGZ25 digitizes downstream IF signals from the QAM demodulator path, providing the high SNR needed for high-order modulation. Its 250 MSPS throughput captures multi-channel bonded downstream blocks without aliasing, while the LVDS DDR interface streams data into demodulation ASICs or FPGAs. The 1.8 V analog supply simplifies thermal design in sealed headend chassis, and the small 7x7 mm package supports dense multi-channel receiver cards. Pair it with a Ti DOCSIS tuner front end and a TPS7A4701 LDO for clean analog rail. The 12-bit resolution comfortably meets DOCSIS 3.1 SNR margin requirements at downstream carrier frequencies up to 1 GHz.
Recommandé
Radar Signal Processing Front End
In short-range radar and automotive driver-assistance (ADAS) front ends, the ADS4129IRGZ25 digitizes IF outputs from radar mixers operating at 40-77 GHz carrier, then downconverted to baseband or low-IF. Its 250 MSPS throughput supports the wide instantaneous bandwidth needed for high-range-resolution radar, while the LVDS outputs simplify interface to radar signal processing FPGAs. The 7x7 mm VQFN-48 package is small enough to fit multiple ADC channels in a tight radar module, and the industrial -40 to +85 C temperature grade suits automotive under-hood environments. Pair with a low-noise amplifier and an AWR1642 radar transceiver SoC for a complete FMCW radar front end.
Recommandé
Industrial High-Speed Data Acquisition
The ADS4129IRGZ25 is well suited to industrial data acquisition systems that need to digitize multiple high-speed analog sensors such as vibration, acoustic emission, or partial-discharge signals. Its 250 MSPS sample rate allows simultaneous capture of multiple sensors through a multiplexer, or single-channel capture at very high time resolution for transient analysis. The LVDS DDR interface enables reliable transfer over longer board traces to a host FPGA or processor, which is critical in electrically noisy industrial environments. Designers commonly pair it with an ISO224 isolation amplifier on the front end and a TMS320C6678 DSP for downstream signal processing. Compared with integrating dual-slope ADCs, the ADS4129IRGZ25 provides 4-5 orders of magnitude higher throughput for time-domain analysis.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADS4129IRGZ25 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADS4128IRGZR | ADS4149IRGZ25 | ADS4142IRGZ25 | ADS6129IRGZ25 | ADS6149IRGZ25 | ADS4148IRGZR |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-VQFN (RGZ) 7x7 mm | 48-VQFN (RGZ) 7x7 mm - same | 48-VQFN (RGZ) 7x7 mm - same | 48-VQFN (RGZ) 7x7 mm - same | 48-VQFN (RGZ) 7x7 mm - same | 48-VQFN (RGZ) 7x7 mm - same | 48-VQFN (RGZ) 7x7 mm - same |
| Resolution | 12 bit | 12 bit | 14 bit | 14 bit | 12 bit | 14 bit | 14 bit |
| Max Sample Rate | 250 MSPS | 200 MSPS | 250 MSPS | 160 MSPS | 105 MSPS | 105 MSPS | 200 MSPS |
| Analog Supply | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 3.3 V | 3.3 V | 1.8 V |
| Digital Output | LVDS DDR / CMOS | LVDS DDR / CMOS | LVDS DDR / CMOS | LVDS DDR / CMOS | LVDS DDR / CMOS | LVDS DDR / CMOS | LVDS DDR / CMOS |
| Pinout Compatible | Yes (baseline) | Yes - drop-in | Yes - drop-in | Yes - drop-in | Yes - drop-in (different supply) | Yes - drop-in (different supply) | Yes - drop-in |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Principaux différenciateurs
- Balanced combination of speed, resolution, and low power (vs ADS4128IRGZR)
- Lower power consumption than 14-bit same-speed ADCs (vs ADS4149IRGZ25)
- Smaller and lower-cost than higher-end JEDEC ADC families (vs AD9629 (ADI))
Notes de conception
Place a 1 uF X7R ceramic plus a 0.1 uF X7R ceramic within 2 mm of every AVDD and DRVDD pin pair, with vias to the dedicated ground plane. Keep the analog input traces a controlled-impedance differential pair (typically 100 ohms differential) and route them with continuous reference ground on the layer below. The exposed thermal pad must be soldered to a contiguous ground copper pour with multiple thermal vias to keep junction temperature within the industrial range.
Drive the sampling clock with a low-jitter differential source such as the LMK04803 or LMX2491. Jitter on CLKP/CLKM directly translates to SNR degradation: estimated SNR limit = 20*log10(1 / (2*pi*fIN*TJ)), so at 170 MHz IF a 1 ps RMS jitter degrades SNR by ~10 dB compared to the datasheet figure. Route the clock differential pair with 100 ohm controlled impedance, length-matched to within 1 mm, and keep clock traces away from LVDS data outputs.
Do not leave the PDN pin floating - tie it low through a 10 kohm resistor, or the ADC may enter power-down mode unpredictably. The RESET pin also requires a defined logic level at power-up; a 10 kohm pull-up to DRVDD is recommended. Avoid driving the analog input as a single-ended signal; the ADC is designed for differential drive and single-ended input will substantially reduce SNR and may damage the input ESD structure. Finally, ensure the SPI SDATA, SCLK, and SEN traces do not cross or run parallel to LVDS data outputs.
Informations de conformité
RoHS and REACH compliance per Texas Instruments product page; lead-free (Pb-free) reflow profile per JEDEC J-STD-020. AEC-Q100 qualification not applicable - the part is not marketed as automotive grade. Halogen-free status not explicitly stated in verified data.
